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375fd15fbf
Refactor `modules/indexer` to make it more maintainable. And it can be easier to support more features. I'm trying to solve some of issue searching, this is a precursor to making functional changes. Current supported engines and the index versions: | engines | issues | code | | - | - | - | | db | Just a wrapper for database queries, doesn't need version | - | | bleve | The version of index is **2** | The version of index is **6** | | elasticsearch | The old index has no version, will be treated as version **0** in this PR | The version of index is **1** | | meilisearch | The old index has no version, will be treated as version **0** in this PR | - | ## Changes ### Split Splited it into mutiple packages ```text indexer ├── internal │ ├── bleve │ ├── db │ ├── elasticsearch │ └── meilisearch ├── code │ ├── bleve │ ├── elasticsearch │ └── internal └── issues ├── bleve ├── db ├── elasticsearch ├── internal └── meilisearch ``` - `indexer/interanal`: Internal shared package for indexer. - `indexer/interanal/[engine]`: Internal shared package for each engine (bleve/db/elasticsearch/meilisearch). - `indexer/code`: Implementations for code indexer. - `indexer/code/internal`: Internal shared package for code indexer. - `indexer/code/[engine]`: Implementation via each engine for code indexer. - `indexer/issues`: Implementations for issues indexer. ### Deduplication - Combine `Init/Ping/Close` for code indexer and issues indexer. - ~Combine `issues.indexerHolder` and `code.wrappedIndexer` to `internal.IndexHolder`.~ Remove it, use dummy indexer instead when the indexer is not ready. - Duplicate two copies of creating ES clients. - Duplicate two copies of `indexerID()`. ### Enhancement - [x] Support index version for elasticsearch issues indexer, the old index without version will be treated as version 0. - [x] Fix spell of `elastic_search/ElasticSearch`, it should be `Elasticsearch`. - [x] Improve versioning of ES index. We don't need `Aliases`: - Gitea does't need aliases for "Zero Downtime" because it never delete old indexes. - The old code of issues indexer uses the orignal name to create issue index, so it's tricky to convert it to an alias. - [x] Support index version for meilisearch issues indexer, the old index without version will be treated as version 0. - [x] Do "ping" only when `Ping` has been called, don't ping periodically and cache the status. - [x] Support the context parameter whenever possible. - [x] Fix outdated example config. - [x] Give up the requeue logic of issues indexer: When indexing fails, call Ping to check if it was caused by the engine being unavailable, and only requeue the task if the engine is unavailable. - It is fragile and tricky, could cause data losing (It did happen when I was doing some tests for this PR). And it works for ES only. - Just always requeue the failed task, if it caused by bad data, it's a bug of Gitea which should be fixed. --------- Co-authored-by: Giteabot <teabot@gitea.io>
178 lines
4.2 KiB
Go
178 lines
4.2 KiB
Go
// Copyright 2019 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package elasticsearch
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import (
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"context"
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"fmt"
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"strconv"
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"code.gitea.io/gitea/modules/graceful"
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indexer_internal "code.gitea.io/gitea/modules/indexer/internal"
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inner_elasticsearch "code.gitea.io/gitea/modules/indexer/internal/elasticsearch"
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"code.gitea.io/gitea/modules/indexer/issues/internal"
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"github.com/olivere/elastic/v7"
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)
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const (
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issueIndexerLatestVersion = 0
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)
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var _ internal.Indexer = &Indexer{}
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// Indexer implements Indexer interface
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type Indexer struct {
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inner *inner_elasticsearch.Indexer
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indexer_internal.Indexer // do not composite inner_elasticsearch.Indexer directly to avoid exposing too much
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}
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// NewIndexer creates a new elasticsearch indexer
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func NewIndexer(url, indexerName string) *Indexer {
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inner := inner_elasticsearch.NewIndexer(url, indexerName, issueIndexerLatestVersion, defaultMapping)
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indexer := &Indexer{
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inner: inner,
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Indexer: inner,
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}
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return indexer
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}
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const (
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defaultMapping = `{
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"mappings": {
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"properties": {
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"id": {
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"type": "integer",
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"index": true
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},
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"repo_id": {
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"type": "integer",
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"index": true
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},
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"title": {
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"type": "text",
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"index": true
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},
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"content": {
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"type": "text",
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"index": true
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},
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"comments": {
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"type" : "text",
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"index": true
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}
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}
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}
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}`
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)
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// Index will save the index data
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func (b *Indexer) Index(ctx context.Context, issues []*internal.IndexerData) error {
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if len(issues) == 0 {
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return nil
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} else if len(issues) == 1 {
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issue := issues[0]
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_, err := b.inner.Client.Index().
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Index(b.inner.VersionedIndexName()).
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Id(fmt.Sprintf("%d", issue.ID)).
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BodyJson(map[string]interface{}{
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"id": issue.ID,
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"repo_id": issue.RepoID,
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"title": issue.Title,
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"content": issue.Content,
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"comments": issue.Comments,
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}).
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Do(ctx)
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return err
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}
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reqs := make([]elastic.BulkableRequest, 0)
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for _, issue := range issues {
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reqs = append(reqs,
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elastic.NewBulkIndexRequest().
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Index(b.inner.VersionedIndexName()).
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Id(fmt.Sprintf("%d", issue.ID)).
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Doc(map[string]interface{}{
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"id": issue.ID,
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"repo_id": issue.RepoID,
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"title": issue.Title,
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"content": issue.Content,
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"comments": issue.Comments,
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}),
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)
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}
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_, err := b.inner.Client.Bulk().
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Index(b.inner.VersionedIndexName()).
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Add(reqs...).
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Do(graceful.GetManager().HammerContext())
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return err
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}
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// Delete deletes indexes by ids
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func (b *Indexer) Delete(ctx context.Context, ids ...int64) error {
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if len(ids) == 0 {
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return nil
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} else if len(ids) == 1 {
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_, err := b.inner.Client.Delete().
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Index(b.inner.VersionedIndexName()).
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Id(fmt.Sprintf("%d", ids[0])).
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Do(ctx)
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return err
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}
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reqs := make([]elastic.BulkableRequest, 0)
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for _, id := range ids {
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reqs = append(reqs,
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elastic.NewBulkDeleteRequest().
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Index(b.inner.VersionedIndexName()).
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Id(fmt.Sprintf("%d", id)),
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)
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}
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_, err := b.inner.Client.Bulk().
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Index(b.inner.VersionedIndexName()).
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Add(reqs...).
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Do(graceful.GetManager().HammerContext())
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return err
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}
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// Search searches for issues by given conditions.
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// Returns the matching issue IDs
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func (b *Indexer) Search(ctx context.Context, keyword string, repoIDs []int64, limit, start int) (*internal.SearchResult, error) {
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kwQuery := elastic.NewMultiMatchQuery(keyword, "title", "content", "comments")
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query := elastic.NewBoolQuery()
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query = query.Must(kwQuery)
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if len(repoIDs) > 0 {
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repoStrs := make([]interface{}, 0, len(repoIDs))
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for _, repoID := range repoIDs {
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repoStrs = append(repoStrs, repoID)
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}
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repoQuery := elastic.NewTermsQuery("repo_id", repoStrs...)
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query = query.Must(repoQuery)
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}
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searchResult, err := b.inner.Client.Search().
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Index(b.inner.VersionedIndexName()).
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Query(query).
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Sort("_score", false).
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From(start).Size(limit).
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Do(ctx)
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if err != nil {
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return nil, err
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}
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hits := make([]internal.Match, 0, limit)
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for _, hit := range searchResult.Hits.Hits {
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id, _ := strconv.ParseInt(hit.Id, 10, 64)
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hits = append(hits, internal.Match{
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ID: id,
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})
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}
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return &internal.SearchResult{
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Total: searchResult.TotalHits(),
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Hits: hits,
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}, nil
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}
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